Progress and plans for R&D and the conceptual design of the ILC injector systems

The International Linear Collider (ILC) Injector is a complex of different subsystems that are strictly correlated: positron source, polarized electron source, damping rings and bunch compressor. The choice of parameters of each subsystem has a strong influence on the others. A description of the critical items requiring further R&D in order to finalize the choice of the parameters needed for the Conceptual Design is given. The status and plans of R&D in progress on these items at a global level are reported.